Screw driver conditioner



April 20, 1948. G. E. BRULPQRT I 2,439,839

SCREW DRIVER CONDITIONER Filed Aug. 1, 1947' awn "M 0506 65 .6. BFULPORT' 7! WWW Patented Apr. 20, 1948 UNITED STATES PATENT OFFICE 2,439,839 I sopEv-v DRIVER CQNDIIIONEB George E, Bul pen, Rassmnync, Qhi Application August 1, 1947, Ser a No.- "765,355

driver recon- 'It is an object of this invention to provide a means for reconditioning screw drivers for watch repair work and the like, for sharpening the blade of the screw driver, and providing the proper width of bit on the blade.

Another object of this invention is to provide a sharpening device of the kind to be more par ticul-arly described hereinafter, having a pair of abrasive rollers between which the screw driver blade or the like is adapted to be engaged for cute ting the proper bit on the blade, the rollers being supported for adjustment relative to each other so that various sized screw drivers may be ac.- commodatedl Another object or this invention is to provide a device of this kind having transversely spaced apart abrasive rollers pivotally connected together by their supporting means and means for adjusting the spaced apart relation of the abrasive rollers.

A further object of this invention is to provide an indicating means carried by the abrasive roller supports for indicating the spaced apart relation of the rollers.

With the above and other objects in View, my invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a side elevation of a screw driver reconditioning device constructed according to an embodiment of this invention;

Figure 2 is a front elevation;

Figure 3 is a fragmentary transverse section partly broken away taken on the line 3-3 of Figure 2; and

Figure 4 is a bottom plan view partly broken away and partly in section.

Referring to the drawings, the numeral l6 designates generally a screw driver of the type generally used in watch repair work and the like on which a properly shaped screw engaging blade H is secured. For sharpening the blade H, I have provided a pair of spaced apart abrasive members or rollers l2 and 14 between which the blade I: is adapted to be engaged for reconditioning the edge thereof. 1

The rollers 12 and M are supported on the support l by pivotally connected supporting links l5 and l! at each end thereof. The support 15 is formed of a pair of intersecting crossed supporting links it and i! hingedly connected to- 6 Slain-1s. (Cl. file-e214) gether intermediate their lengths by hinge pins or-bolts l8.

A pair of supporting members It and H are disposed at each end of the rollers l2 and I4.

' A bolt lfi'engages through one of the abrasive members as l2 and between the upper end of the supporting links H at each end. The supporting links l6 are connected at their upper ends to the bolt 2-9 engaging through the abrasive roll-er H3.

The lower end of the links 16 and I1 is free and pivotal movement of the links about their central pivot point It will move the abrasive rollers 42 and i4 farther apart or closer together to de. tei mine the size of point on the blade I l.

The ends opposite the rollers of the supporting links 46 are connected together by a rod 2:! disposed in parallel relationship to the abrasive roller I 4. The rod 2| is secured on the link [6 by rivet heads 22 or other suitable fastening device. A similar rod 24 is connected between the lower ends of the other supporting links H and connected by similar rivet heads 25 or other suitable fastening device.

An adjusting bolt 26 is rotatably secured between the rods 2| and 24 midway the length thereof below the rollers l2 and I4 and below the hinge points 18 thereof. The adjusting screw 26 loosely engages through one of the rods as H and threadably engages in the other rod 24 as indicated in the Figure 4.

A rod 21 is disposed about the bolt 26 outwardly of the sleeve 2! and a knurled finger grip 28 is provided on the screw 26 outwardly of the sleeve 27. One of the supporting links as It is provided with a series of indicating marks as 29 below the pivot point l8.

A pointed indicator as 3!! is fixed to or carried by the adjacent link as I! and cooperates with the indicia 29 for indicating the space between the rollers l2 and M. This space between the rollers will be proportional to the width of the edge of the blade H on the screw driver It.

In the use and operation of this screw driver reconditioning device the distance between the abrasive members l2 and I 4 is initially adjusted by turning the adjusting screw '26 until the pointer 30' registers with the selected index mark 29. At this time the space between the rollers will be indicated at this point.

'Ilhe blade of the screw driver It is then moved longitudinally of the rollers 12 and [4 for cutting the blade to the desired contour with the necessary selected edge thereof.

I do not mean to confine myself to the exact details of construction herein disclosed but claim all variations falling within the purview of the appended claims.

Having thus described my invention, what I claim is:

1. A screw driver sharpener comprising a pair of transversely spaced apart cylindrical abrasive members, supporting means for said abrasive members, means carried by said supporting means for selectively adjusting the distance between said abrasive members, and means carried by said supporting means indicating the spaced apart relation of said abrasive members.

2. A screw driver reconditloner comprisinga pair of transversely spaced apart cylindrical abrasive members, a pair of pivotally connected supporting members at each end of said abrasive members, means securing each of said abrasive members at each end of one of said supporting! members, and an adjusting screw carried by said supporting members securing said supporting members in selected pivoted position for adjusting the spaced apart relation of said abrasive members. r

'3. Ash-arpening device comprising a pair of spaced apartabrasive members, a pair of supporting members for each of said abrasive members, means pivotally connecting the supporting members of one of said abrasive members to the supporting members of the other abrasive member and adjusting screw engaging between the supporting members of one of said abrasive members and the supporting members of the other abrasive member for selectively adjusting the spaced apart relation of said abrasive members. w p p H v r 4. A sharpening device comprising a pair of transversely spaced apart elongated abrasive members, a supporting link at each end of said abrasive members, means pivotally connecting the supporting links of one abrasive member to the supporting links of the other member intermediate the length thereof in crossed relation, and adjusting means engaging between said crossed links opposite the pivot thereof for adjusting the spacedapart relation of said abrasive members.

5; A sharpening device comprising a pair of transversely spaced apart elongated abrasive members, a supporting link at each end of said abrasive members, means pivotally connecting the supporting links of one of said members to the supporting links of the other of said members in crossed relation, adjusting means engaging between said crossed links opposite the pivot thereof for adjusting the spaced apart relation of said abrasive members, and correlated means carried by at least one pair of crossed links indicating the spaced apart relation of said abrasive members.

6. A sharpening device comprising a pair of transversely spaced apart elongated abrasive members, a supporting link at each end of said abrasive member, means pivotally connecting the supporting links of one of said abrasive members to the supporting 1inks of the other abrasive member, anadjusting screw engaging between said pivotally connected links for adjusting the spaced apart relation of said abrasive member, an index on one of said links,- and a pointer of another of said links for registering with said index for indicating the spaced apart relation of said abrasive members.

GEORGE E. BRULPORT. 

